TAT-1 (1956–1971) — first transatlantic telephone cable

1. Commercial transatlantic phone service begins by radio

   Jan 7, 1927Labels: Long-wave radio, Transatlantic service

   • Britannica
   • EDN

2. UK announces agreement for TAT-1 project

   Dec 1, 1953Labels: UK General, AT&T, Canadian telecom

   • TAT 1 Wiki
   • IEEE ComSoc

3. Manufacture and design choices enable long undersea telephony

   Jan 1, 1954Labels: Coaxial cable, Polyethylene insulation, Vacuum-tube repeater

   • TAT 1 Wiki
   • Britannica

4. First main cable laid across the Atlantic

   Aug 1, 1955Labels: Cable ship, Deep-sea cable

   • TAT 1 Wiki
   • BritishTelephones

5. Second main cable and links completed

   Aug 14, 1956Labels: Oban Scotland, Clarenville Newfoundland

   • BritishTelephones
   • TAT 1 Wiki

6. TAT-1 inaugurated as first transatlantic telephone cable

   Sep 25, 1956Labels: TAT-1, Inauguration

   • IEEE ComSoc
   • Science Museum
   • TAT 1 Wiki

7. Heavy early use highlights demand for transatlantic calling

   Sep 26, 1956Labels: London North

   • TAT 1 Wiki
   • Transatlantic cable

8. TAT-1 used for high-profile transatlantic broadcast event

   May 1, 1957Labels: Paul Robeson, Transatlantic broadcast

   • Science Museum
   • TAT 1 Wiki

9. Capacity expanded by narrowing channel bandwidth

   Jan 1, 1958Labels: Channel engineering

   • TAT 1 Wiki
   • Transatlantic cable

10. TASI technology doubles effective speech circuits

    Jun 1, 1960Labels: TASI, Speech interpolation

    • TAT 1 Wiki
    • TASI Wiki

11. Hotline traffic routed via TAT-1 for Washington–London leg

    Aug 30, 1963Labels: Moscow Washington, Emergency communications

    • Hotline Wiki
    • HISTORY

12. TAT-1 retired after being surpassed by newer systems

    Jan 1, 1978Labels: Retirement, Successor systems

    • Transatlantic cable
    • IEEE ComSoc
    • TAT 1 Wiki